Facebook Still Overvalued?: Tech Winners & Losers

Shares of Facebook tumble after getting negative attention over the weekend when a Barron's article said the stock is only worth $15.

NEW YORK ( TheStreet) -- Just when you thought it was safe to go back in the water.

Facebook ( FB) shares were falling sharply after the social media giant received negative attention over the weekend from Barron's, which published an article saying the stock was worth only $15.

"Is the stock a buy? The short answer is 'No'," wrote author Andrew Bary. "After a recent rally, to $23 from a low of $17.55, the stock trades at high multiples of both sales and earnings, even as uncertainty about the outlook for its business grows."

Shares of Facebook, which has been plagued by the disastrous handling of its IPO, slowing revenue growth and concerns about its future in mobile, were last quoted at $20.83, down nearly 9%, on volume of more than 62.1 million, above the issue's 30-day moving average churn of 41.6 million.

If you bought the iPhone 5 this weekend, Wall Street analysts are wondering why you didn't tell your friends, or buy more.

There were several analysts, including Piper Jaffray's Gene Munster who were expecting millions more. Sterne Agee's Shaw Wu had a different perspective on the number, saying the sell side's estimates were out of line.

"We are not overly concerned with this 'disappointing' number as we believe this is a classic case of near-term expectations getting out of touch with reality. We find it unfortunate that some analysts continue to publish irresponsible estimates without taking into account realistic demand trends and potential supply constraints on new in-cell touchscreens," Wu wrote in his note.

Wu has a buy rating on Apple with a $840 price target.

If you wanted to know when the last time Google ( GOOG) shares were this high, you'd probably, well, have to Google it.

Shares of the Internet search giant touched a peak earlier, hitting $748.89 in afternoon trading. The stock hasn't been this high in nearly five years when it reached $747.24 in November 2007.

Google shares was recently trading at $747.78, good for a gain of 1.88%, outpacing the broader Nasdaq, which was down 0.9% in mid-Monday trading.

Interested in more on Google? See TheStreet Ratings' report card for this stock.